Sofia Reis and Nuno Correia write: “In this paper we present proposals for including real world elements in games taking into account the profile of casual players. Several real world elements can be utilized so that the fictional game world merges with reality. We focused on sound, video, physiological data, accelerometer data, weather and the player’s location”.

Read the full paper at https://www.researchgate.net/publication/261327666_Casual_Games_with_a_Pervasive_Twist (free registration required)